#include <stdio.h>

struct point
{
    double x;
    double y;
};

struct point point_array[100];

int main()
{
    int my_point = 10;
    
    point_array[my_point].x = 12.34;
    point_array[my_point].y = 56.78;
    
    printf("%f, %f\n", point_array[my_point].x, point_array[my_point].y);
    
    return 0;
}
